If 6.25 x 10^15 electrons flow past a given point in a conducter, how do you calculate the current?

Answer 1

You need to know how long it took. Then, use the definition of the Ampere, the SI metric unit of measurement for electrical current.

Answer 2

current = i = dQ/dt = Q/t

You need to know how long it took for that number of electrons to flow past the given point. Then, you can use the above equation to solve for current.

Note: to get Q, you need to multiply the number of electrons by the charge on each electron (1.6 x 10^-19 coulomb), also to get the answer in amperes (A), you will want to have your time in seconds as an ampere = coulomb/second